https://gcc.gnu.org/bugzilla/show_bug.cgi?id=121211
Bug ID: 121211
Summary: ICE: in make_decl_rtl, at varasm.cc:145 with simd
Product: gcc
Version: 16.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: rtl-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: iamanonymous.cs at gmail dot com
Target Milestone: ---
When compiling this program with -fopenmp, GCC crashes:
```
struct {
int a;
} b[];
int c, d;
void e() {
#pragma omp simd aligned(b)
for (d = 0; d < b[c].a; d += 4)
;
}
```
Complier Explorer: https://godbolt.org/z/eoKrhcdK4
The full stack dump:
```
mutant.c:3:5: warning: array 'b' assumed to have one element
3 | } b[];
| ^
during RTL pass: expand
mutant.c: In function 'e':
mutant.c:7:25: internal compiler error: in make_decl_rtl, at varasm.cc:1459
7 | for (d = 0; d < b[c].a; d += 4)
| ~~~~^~
0x5554b38 internal_error(char const*, ...)
../../gcc/gcc/diagnostic-global-context.cc:517
0x54d2d0a fancy_abort(char const*, int, char const*)
../../gcc/gcc/diagnostic.cc:1803
0x2a50b22 make_decl_rtl(tree_node*)
../../gcc/gcc/varasm.cc:1459
0x169b3ea expand_expr_real_1(tree_node*, rtx_def*, machine_mode,
expand_modifier, rtx_def**, bool)
../../gcc/gcc/expr.cc:11487
0x168b75c expand_expr_real(tree_node*, rtx_def*, machine_mode, expand_modifier,
rtx_def**, bool)
../../gcc/gcc/expr.cc:9523
0x16a1063 expand_expr_real_1(tree_node*, rtx_def*, machine_mode,
expand_modifier, rtx_def**, bool)
../../gcc/gcc/expr.cc:12125
0x168b75c expand_expr_real(tree_node*, rtx_def*, machine_mode, expand_modifier,
rtx_def**, bool)
../../gcc/gcc/expr.cc:9523
0x16777b7 store_expr(tree_node*, rtx_def*, int, bool, bool)
../../gcc/gcc/expr.cc:6762
0x1674a3c expand_assignment(tree_node*, tree_node*, bool)
../../gcc/gcc/expr.cc:6483
0x1364c65 expand_gimple_stmt_1
../../gcc/gcc/cfgexpand.cc:4330
0x13652c0 expand_gimple_stmt
../../gcc/gcc/cfgexpand.cc:4411
0x1373f58 expand_gimple_basic_block
../../gcc/gcc/cfgexpand.cc:6472
0x13788bf execute
../../gcc/gcc/cfgexpand.cc:7223
Please submit a full bug report, with preprocessed source (by using
-freport-bug).
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
```
